Hi I'm trying to find out about an anime where the main character is sent to another setting and at first he thinks it's not real and just part of a game

In A Certain Scientific Railgun, it's mentioned several times that there is a curfew for students in Academy City. Why is this so?

At the end of the Fate route,

Is it possible to human can concentrate on counting and count each seconds for 2000 years? In Anime Dr.Store, somehow all humans on earth turned into stone but they not dead they still can thinking, the main character Senku was counting while he was turned into stone and count whole 2000 years...

I am already reading Vinland Saga's ongoing manga. I thought of watching anime, but the manga is very detailed. Is Anime is as good as Manga? Should I really watch it?